Odpowiedź:
[tex]A.\ \ x^5-2x-5-(x^3+3x^2-1)=x^5-2x-5-x^3-3x^2+1=x^5-x^3-3x^2-2x-4\\\\\\B.\ \ x^5-7x+2-2(x^3-x^2+3)=x^5-7x+2-2x^3+2x^2-6=x^5-2x^3+2x^2-7x-4\\\\\\C.\ \ -2x^5+4x-2+2(x^3-x^2-3)=-2x^5+4x-2+2x^3-2x^2-6=\\\\=-2x^5+2x^3-2x^2+4x-8\\\\\\D.\ \ -(2x^5-2x+4)-2(x^3-x^2)=-2x^5+2x-4-2x^3+2x^2=\\\\=-2x^5-2x^3+2x^2+2x-4\\\\Odp.C[/tex]
